Respuesta :

Answer:

A and C

Step-by-step explanation:

for A

QT/RT=ST/QT=QS/QR  

There are two QT's in this

so

(QT)^2 = RT * ST

FOR B

there is no RT twice

for C

QR/RT RS/QR

There is a QR twice

so QR^2=RT*RS

FOR D there is no RT twice  

(if you have the other answers for this quiz plz give them to me lol)